Benzylacetate synthesis by oxyacetoxylation of toluene on Pd–Bi binary catalyst

Benzylacetate synthesis from toluene, acetic acid and oxygen on Pd–Bi binary catalyst was studied in the liquid phase. By incorporation of Bi with Pd, both the activity and selectivity were improved. Especially better stability was obtained with the catalyst having Pd/Bi = 3. Deactivation of the catalyst was investigated in detail by XRD, XPS, TEM, elemental analysis, EPMA and so on. Comparing the used catalyst with the fresh one, it was indicated that the main cause of deactivation was the dissolution of Pd into the reaction mixture from the most outer surface of the catalyst. By adopting proper reaction conditions to prevent the Pd dissolution, the catalyst having Pd/Bi = 3 was suggested to be used as an industrial catalyst. This revised version was published online in June 2006 with corrections to the Cover Date.     

固体超强酸TiO2/SO42-催化合成乙酸苄酯

研究了以固体超强酸TiO2/SO4^2-为催化剂,乙酸和苄醇为原料合成乙酸苄酯,考察了反应条件对酯化率的影响,结果表明,当酸的用量为0．2mol,醇酸摩尔比为1．8,催化剂用量为2．0g ,带水剂甲苯为15mL,反应时间为2．0h,反应温度为100－110℃时,酯化率达91．2％。     

硫酸高铈铵催化合成乙酸苄酯的研究

研究了以硫酸高铈铵为催化剂 ,乙酸和苄醇为原料合成乙酸苄酯 ,并考察了反应条件对酯化率的影响 ,结果表明 ,在适宜条件下其酯化率达 87.9%。     

壳聚糖硫酸盐催化合成乙酸苄酯

以壳聚糖硫酸盐为催化剂,由乙酸和苄醇合成乙酸苄酯。考察了催化剂用量、反应时间等因素对反应的影响。实验结果表明,在催化剂用量为０．４ｇ、反应时间为２．５ｈ的条件下,产品收率为８３％,并且催化剂可重复使用多次     

活性炭固载氯化铁催化合成乙酸苄酯

研究了以活性炭固载氯化铁为催化剂,乙酸和苄醇为原料 合成乙酸苄酯,并考察了反应条件对酯化率的影响,结果 表明,在适宜条件下其酯化率达89％。